From Speedway Motors catalog:
5.There are no provisions for a vacuum advance line. Ford & Mercury engines 1949-1953 using stock distributors will need an alternative place to connect the vacuum line.

The real Stromburg folks just spent a mint to get the carb back into production, that one does have ported vacuum. So, why would they want to give tech advice to a clone?

I also found this: "The ported vacuum 97 base is also available separately if you already have a suitable Stromberg 97. See part No. 9514-VP, under Service & Restoration parts." Factory price is $149.


R.